Your power supply looks great ... but otherwise, you're killing us :lol: The deal:
The A8-3870K should work well with the HD6570, but the HD6570 would likely run much better in dual-graphics with a Trinity APU on FM2. Here's why:
The A8-3870K APU has HD55xx/56xx
Redwood cores. A Trinity APU has HD65xx/66xx
Turks cores. From a design standpoint, the Redwood and Turks cores are similar BUT there are subtle differences. These differences can effect performance.
And it just kinda makes sense that in dual-graphics, a Trinity APU with a Turks
SIMD engine array (that's what AMD calls the graphics engine on the APU) would work best in combination with a discreet HD65xx/66xx video card with
Turks cores. It's simply easier to sync-up the core and memory clocks between the APU and the discreet card to run in dual-graphics.
AND ... there's this thing ... sometimes the Llano APUs in dual-graphics had issues with older games in DX9. This may or may not be an issue for you depending upon your gaming, but is certainly something you might encounter.
SO ... :lol: ... (drum-roll, please) with an eye to future upgrades and performance, I think a Trinity APU on FM2 with your HD6570 is preferable to your A8-3870K Llano with a HD7750 CrossFire. Probably even better if you became a Win8 early adopter, too, if you decide to go Trinity/FM2.
This is mobile, but desktop should be similar (
Thames is actually the mobile version of
Turks):